But according to 'reliable sources', Apple has already allowed certain companies access to an early version of the Apple iPhone SDK, Electronista reports.

The early SDK enables developers to create real software for use on the Apple iPhone and Apple iPod touch but there are still limitations as to what kind of programs can be developed at this stage.

The first developers to get access to Apple's SDK has apparently been using it for a few weeks already, and will be able to deliver complete applications much earlier than those developers who have to wait until February to get their hands on the Apple SDK.